Feedeeick w



(No Model.)

. ]E. W. JACKSON. FURNITURE (EASTER.

No. 314,847. Patented Mar. 31, 1885.

.Zfmrenfaz: $51M 4% M 2 21 E 55 E5.

UNITED, STATES PATENT OFFICE.

O. MENDENHALL,

OF SAME PLACE.

FURNlTUR E-CASTER.

SPECIFICATION forming part of Letters Patent No. 314,847, dated March 31, 1885.

Application filed July 10, 1884. (No model.)

To all whom it may concern.-

1 Be it known that], FREDERICK W. JAoK- soN, a citizen of the United States, residing at Richmond, in the county of Wayne and State 5 of Indiana, have invented certain new and useful Improvements in Furniture-Castersfand I do declare the folowing to bea full, clear, and exact description of the invention, such as Will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying draw ings, and to the letters and figures of reference marked thereon, which form a part of this specification.

r 5 This invention relates to that class of furniture-casters which comprise a track-plate, a wheel-frame connected thereto by a swiveljoint, floor -wheels, and a friction roll journaled upon the wheel-frame and traveling upon the track-plate. Heretofore in furniture-casters of this class the swivel-connection between the wheelframe and track -plate has been formed by a separate and independent pivotstud passing through a perforation provided 2 in the wheel-frame at one side of the axis of the floor-wheels, and secured in position by riveting or otherwise. In this construction it is necessary to make the wheel-frame very strong at the point which receives the pivot-stud, to

compensate for the pivot-eye or perforation, and, moreover, the fitting together of the parts and rivet-heading or otherwise securing the pivot-studs occasions much labor and consequent loss of time.

The object of my invention is to obviate these disadvantages, and to provide an improved caster of the class described which will possess advantages in point of simplicity, durability, inexpensiveness, and general efiiciency,

0 and in which the wheel-frame and track-plate can be connected together with facility and convenience.

To this end my invention consists, substautially, in casting or forming a pivot-stud upon 4 5 the wheel-frame, and in certain improvements in the construction and combination of parts, whereby this stud is detachably swiveled to the track-plate, as will be hereinafter fully described, and particularly pointed out in the claims.

In the accompanying drawings, Figure] is a vertical sectional view of my improved caster, partly in side elevation. Fig. 2 is an inverted plan or bottom view of the track'plate, the key-plate being removed, the broken line y 3 indicating the plane on which the section, Fig. 1, through the track'plate is taken. Fig. 3 is aplan view of the keyplateh. Fig. 4 is a verticalsectional view of the track-plate, illustrating a modification. Fig. 5 is an inverted plan or bottom view of this modified form of track-plate. Fig. 6 is a plan view of the key therefor.

Corresponding parts in the figures are denoted by the'same letters of reference.

Referring to the drawings, A designates the wheel-frame, which is preferably cast in a single piece, and is, in the main, of ordinary construction. This frame comprises a main portion, a, carrying the floor-wheels B B and the friction-roller (J, and an arm,- a, projecting at the top of the main portion, for preventing the wheel-frame from falling away form the furniture-plate-when the furnitureis lifted. From the top of the wheel-frame, at one side of the portion (1 is provided with a recessed under 0 surface or bottom, d, in which is centrally provided a cavity, 01 to accommodate the head of the integral pivot-stud A". The recessed bottom d is provided with a rib or pro jection, E, extending from the periphery of 5 the track-plate to and overhanging the cavity d and forming, in connection with the keyplate, a circular undercut socket. vThis keyplate is adapted to be received in the recess in the bottom of the main portion d, and is formed rco with a radial slot, (P, to receive the projection E, and with a central opening, d, concaved or beveled on its inner side, as shown at (1 Figs. 1, 8, and 6, to complete the undercut socket or cavity in the track-plate for the reception and retention of the head of the pivot-stud. The key-plate may be secured to the main portion of the track-plate by screws F or in any other suitable manner.

In the modification illustrated in Figs. 4, 5, and 6 the keyplate proper, d differs in size and shape from that shown in Figs. 1 and 3; but it will be seen that the function is the same, it only being required that the recess d in the bottom of the main portion d of the track-plate be of sufficient size to admit of the passage of the head of the pivot-stud A to the central cavity, (1 and that the key-plate d be of a size and shape to fit said recess.

I claim 1. Ina caster, the combination of two floorwheels, an anti-friction wheel or roll, awheel frame or housing having bearing for the axes of said wheels, a vertical pin or stud on said wheel-frame, rounded on its upper surface, a furniture-plate on which the rounded upper surface of said stud and the anti-friction wheel surround the neck on said stud and be fixed to the furniture-plate, respectively, substantially as set forth. 7

4. A track-plate for casters, consisting of a plate provided on its under side with an undercut socket or cavity, a recess communicating with said socket or cavity, and a key-plate to fill said recess, substantially as specified.

5. A furniture-caster consisting of a wheelframe having a headed pivot-stud formed integral therewith, and a track-plate provided with an undercut socket to receive said stud, and a key-plate to secure the same, in combination with the floor-wheels and friction-roll journaled in the wheel-frame.

In-testimony whereof I affix my signature in presence of two witnesses.

FREDERICK W.

memoir. 

